M365 Message Center

Geändert

10.02.2026

Services

Windows

Windows 11, version 26H1 is a hardware‑optimized release designed to enable next‑generation silicon developed in partnership with device manufacturers and silicon partners. This release will be available exclusively as a preinstalled experience on select new devices beginning in early 2026. It is not intended as a feature update for existing Windows 11 devices and will not be offered through Windows Update. When will this happen: The first devices with Windows 11, version 26H1 preinstalled will start shipping in early 2026. This release is limited to select new devices only and is not offered as an in‑place update for devices running Windows 11, versions 25H2 or 24H2. How this will affect your organization: Windows 11, version 26H1 is scoped specifically for select new hardware platforms, so it will not be offered through Windows Update for existing devices and will not impact ongoing ro

Geändert

10.02.2026

Services

Windows

Secure Boot is a foundational Windows security feature that runs at startup, before Windows load, and helps ensure that only trusted, digitally signed software can execute. After more than 15 years of continuous service, the original Secure Boot certificates are reaching the end of their planned lifecycle and begin expiring in late June 2026.To learn more about Microsoft’s effort to update these certificates, see the blog post Refreshing the root of trust: industry collaboration on Secure Boot certificate updates. To prevent disruption and maintain secure startup across Windows environments, plan for these certificates update following the guidance in the Secure Boot playbook.When this will happen:The 2011 Secure Boot certificates begin expiring in June 2026.What you need to do to prepare:Review the Secure Boot playbook for certificates expiring in 2026 to understand requirements, timel

Geändert

10.02.2026

Services

Windows

The February 2026 security update is now available for all supported versions of Windows. We recommend that you install these updates promptly. For more information about the contents of this update, see the release notes, which are easily accessible from the Windows 11 update history page. To learn more about the different types of monthly quality updates, see Windows monthly updates explained. Highlights for the Windows 11, version 25H2 update: This security update includes improvements that were a part of update KB5074109 (released January 13, 2026), KB5077744 (released January 17, 2026), and KB5078127 (released January 24, 2026).This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.This update addresses an issue that determines device eligibility for the full-screen gaming experience.This update addresses an issue that pre

Geändert

08.02.2026

Services

Windows

11:30 am PT update: Microsoft Store and Windows Update services have been restored. Some IT administrators may continue to experience residual latency affecting Windows Server update operations, including the Windows Server sync API. This Server‑specific issue is being addressed separately. If you experience this latency, please contact Microsoft Support for business.8:34 am PT post: A power outage at a datacenter is impacting customers’ ability to complete operations in the Microsoft Store and Windows Update. As a result, some users may experience failures or timeouts when installing or updating Microsoft Store apps, or when downloading Windows updates.Although power has been restored, service recovery is still in progress. Storage services are gradually returning online, and some customer impact may continue while recovery completes.Microsoft is actively working to restore full-service

Geändert

05.02.2026

Services

Windows

Windows is moving toward a more secure authentication model by phasing out New Technology LAN Manager (NTLM) in favor of stronger, Kerberos‑based alternatives. This transition is taking a three-phased approach, leading toward disabling NTLM by default in upcoming Windows releases. With each phase come new capabilities so that your organization has the tools, visibility, and compatibility support needed. When will this happen: NTLM has been deprecated since June 2024. Today, enhanced auditing is available as part of Phase 1 toward NTLM disablement. In the second half of 2026, new tools will be available to Windows Server 2025 and Windows 11, version 24H2 and later: IAKerb, Local KDC, upgrade to negotiate Kerberos. With the next version of Windows Server and its corresponding client version, NTLM will be disabled by default. Additional support for handling NTLM-only cases will be built in.

Geändert

05.02.2026

Services

Exchange Online

[Introduction] We're updating the timeline and process for the retirement of Exchange Web Services (EWS) in Exchange Online. As previously announced, EWS will be retired in favor of Microsoft Graph, which offers improved security, modern authentication, and broader capability support. A phased disablement begins October 1, 2026, with permanent shutdown starting April 1, 2027. [When this will happen:] Phased EWS disablement begins: October 1, 2026 Full and permanent EWS retirement: April 1, 2027 EWS App AllowList feature availability: Coming soon (before retirement milestones) [How this affects your organization:] Who is affected: Organizations using custom or vendor applications that rely on EWS Workflows involving mail, calendar, or integrations that use EWS This change only impacts Exchange Online; Exchange Server (on-premises) is not affectedWhat will happen: Beginning October 1, 2026